DESCRIPTION
PT2502 is an integrated 12V 3-phase sensor-less (no Hall sensor required) BLDC motor controller. Threephase motor control with square/trapezoidal wave is based on detecting a zero-crossing signal generated from the motor back-EMF (BEMF) and provides robust control stability that is not easily affected by different motors. Soft-switching control technology outputs trapezoidal/quasi-sinusoidal-wave current and further reduces audible electro-current noise.

FEATURES
• 3-phase sensor-less BLDC control
• Internal +5V regulator and 5V – 24V power
   application
• Internal OTP write support for motor parameters
• I2C interface for parameter setting
• Over-current protection and over-voltage
   protection
• Thermal protection function with an external NTC
   resistor
• Lock protect function
• PWM or DC control input support for motor
   speed control
• FG output function

APPLICATIONS
• 3-phase sensor-less BLDC motor controller
• High speed fan
• Water pump